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<?php// *单文件上传printf('<pre>%s</pre>',print_r($_FILES,true));if (isset($_FILES['my_pic'])) {// *原始文件名$name = $_FILES['my_pic']['name'];// *临时文件名$tmpName = $_FILES['my_pic']['tmp_name'];//* 错误代码$error = $_FILES['my_pic']['error'];if ($error >0) {$tips = '<span style="color:red">上传失败!</span><br>';switch ($error) {case 1:$tips .= '大小超过了php.ini中的允许上传的文件大小';break;case 2:$tips .= '大小超过了表单中(MAX_FILE_SIZE)的允许上传的文件大小';break;case 3:$tips .= '文件只有部分被上传';break;case 4:$tips .= '没有文件被上传';break;case 6:$tips .= '找不到临时目录';break;case 7:$tips .= '文件写入失败,请检查目录权限';break;}echo "<p>$tips</p>";} else {//*1 判断上传方式是否合法? POSTif (is_uploaded_file($tmpName)) {//* 文件类型白名单$allow = ['jpg','jpeg','png','gif','JPG','JPEG','PNG','GIF'];// *采用pathinfo('xxx.xx')就可得到其后缀名'.xx'//*后缀名$ext$ext = pathinfo($name)['extension'];// *in_array(x,y):判断某一个值x,是否在数组y中if (in_array($ext, $allow)) {// *如果上传方式合法,且是允许的类型,则可以移动到指定的目录中了$path = 'uploads/';// *为了防止同名覆盖,应该给目标文件名重命名// *其中md5(x)是对其加密$dest =$path. md5($name) . '.' . $ext;// *将文件从临时目录移动到目标目录中if (move_uploaded_file($tmpName, $dest)) {echo '<p>上传成功</p>';//* 预览echo "<img src='$dest' width='300'>";} else {echo '<p>上传不成功</p>';}} else {echo '<p>文件类型错误</p>';}} else {echo '<p>上传方式非法</p>';}// echo '上传成功了，进行下一步操作';}}?><!DOCTYPE html><html lang="zh-CN"><head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>单文件上传</title></head><body><form action="" method="POST" enctype="multipart/form-data"><fieldset><legend>单文件上传</legend><input type="hidden" name="MAX_FILE_SIZE" value="1000000"><input type="file" name="my_pic"><button>上传</button></fieldset></form></body></html>
<?php// *多文件上传-逐个上传printf('<pre>%s</pre>', print_r($_FILES, true));foreach ($_FILES as $file) {//* 只要判断$file['error'] === 0 表示上传成功if ($file['error'] === 0) {// *暂不加密目标文件名$dest = 'uploads/' . $file['name'];// *移动到目标目录中move_uploaded_file($file['tmp_name'], $dest) ;// *预览echo "<img src='$dest' width='200'>";}}?><!DOCTYPE html><html lang="zh-CN"><head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>多文件上传-1</title></head><body><form action="" method="POST" enctype="multipart/form-data"><fieldset><legend>多文件上传-1:逐个上传</legend><input type="file" name="my_pic1"><input type="file" name="my_pic2"><input type="file" name="my_pic3"><button>上传</button></fieldset></form></body></html>
<?php// *多文件上传-逐个上传采用二维数组形式//* $_FILESprintf('<pre>%s</pre>', print_r($_FILES, true));// *判断服务器中超全局变量$_FILES中的my_pic数组是否存在if (isset($_FILES['my_pic'])) {// *遍历二维数组中的[error]键foreach ($_FILES['my_pic']['error'] as $key=>$error) {//* 0 => UPLOAD_ERR_OK// *如果error键的值为0if ($error === UPLOAD_ERR_OK) {// *临时文件名$tmpName// *$key:键变量，分别代表[0],[1],[2]$tmpName = $_FILES['my_pic']['tmp_name'][$key];//* 原始文件名$name = $_FILES['my_pic']['name'][$key];// *暂不加密目标文件名$dest = 'uploads/' . $name;// *移动到目标目录中move_uploaded_file($tmpName, $dest) ;// *预览echo "<img src='$dest' width='200'>";}}}?><!DOCTYPE html><html lang="zh-CN"><head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>多文件上传-2</title></head><body><form action="" method="POST" enctype="multipart/form-data"><fieldset><legend>多文件上传-2:逐个上传</legend><input type="file" name="my_pic[]"><input type="file" name="my_pic[]"><input type="file" name="my_pic[]"><button>上传</button></fieldset></form></body></html>
<?php// *多文件上传-批量上传//* $_FILESprintf('<pre>%s</pre>', print_r($_FILES, true));// *判断服务器中超全局变量$_FILES中的my_pic数组是否存在if (isset($_FILES['my_pic'])) {// *遍历二维数组中的[error]键foreach ($_FILES['my_pic']['error'] as $key=>$error) {//* 0 => UPLOAD_ERR_OK// *如果error键的值为0if ($error === UPLOAD_ERR_OK) {// *临时文件名$tmpName// *$key:键变量，分别代表[0],[1],[2]$tmpName = $_FILES['my_pic']['tmp_name'][$key];//* 原始文件名$name = $_FILES['my_pic']['name'][$key];// *暂不加密目标文件名$dest = 'uploads/' . $name;// *移动到目标目录中move_uploaded_file($tmpName, $dest) ;// *预览echo "<img src='$dest' width='200'>";}}}?><!DOCTYPE html><html lang="zh-CN"><head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>多文件上传-2</title></head><body><form action="" method="POST" enctype="multipart/form-data"><fieldset><legend>多文件上传-3:批量上传</legend><!-- multiple: 允许同时选择多个 --><input type="file" name="my_pic[]" multiple><button>上传</button><!-- 与demo3.php相比,只改了二个地方 --><!-- 1. 只保留一个my_pic[] --><!-- 2. 加一个 multiple 属性,支持多选 --><!-- php处理上传的代码和demo3.php完全一样,不用动 --></fieldset></form></body></html>
